go to a food bank or a fucking soup kitchen. dress shitty. they will give you pasta and meat and shit so your not eating corn and tobasco out of the fucking can.
Or, get your ass up, get dressed in some work clothes, get a 44. oz cup with a lid and straw, and head to the nearest hardware store. When you go in there, bring the cup, empty, but with the lid on like you have pop in it. Get a cart.
Go to the section that has copper/brass fittings, and there should be some thick copper fittings about an inch long, the thickest they have. Sometimes they are in plastic bags. Put a bunch of fittings in the cart. Go to a section of the store where there is less traffic and not many expensive items, like the gardening chemicals section or some shit. Fill your pockets and the cup with as many fittings as you can without looking like your pockets are full of shit. Abandon the cart and leave, sipping from your 'drink' as you stroll through the door. Repeat at as many hardware stores as you can.
Go to a metal recycler and sell the fittings. If you are paranoid about bringing in pounds of gleaming, brand new copper fittings, throw them in a fire for a bit and let them get all dirty and burned-looking, then you can say you found them in a burnpile or something like that.
Now you have grocery money for the week.